/* $NetBSD: bus_funcs.h,v 1.2 2014/07/29 21:21:44 skrll Exp $ */ /* * Copyright (c) 1996, 1997, 1998, 2001 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, * NASA Ames Research Center. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ #ifndef _COBALT_BUS_FUNCS_H_ #define _COBALT_BUS_FUNCS_H_ /* * uintN_t bus_space_read_N(bus_space_tag_t tag, * bus_space_handle_t bsh, bus_size_t offset); * * Read a 1, 2, 4, or 8 byte quantity from bus space * described by tag/handle/offset. */ #define bus_space_read_1(t, h, o) \ ((void) t, (*(volatile uint8_t *)((h) + (o)))) #define bus_space_read_2(t, h, o) \ ((void) t, (*(volatile uint16_t *)((h) + (o)))) #define bus_space_read_4(t, h, o) \ ((void) t, (*(volatile uint32_t *)((h) + (o)))) #if 0 /* Cause a link error for bus_space_read_8 */ #define bus_space_read_8(t, h, o) !!! bus_space_read_8 unimplemented !!! #endif /* * void bus_space_write_N(bus_space_tag_t tag, * bus_space_handle_t bsh, bus_size_t offset, * uintN_t value); * * Write the 1, 2, 4, or 8 byte value `value' to bus space * described by tag/handle/offset. */ #define bus_space_write_1(t, h, o, v) \ do { \ (void) t; \ *(volatile uint8_t *)((h) + (o)) = (v); \ } while (0) #define bus_space_write_2(t, h, o, v) \ do { \ (void) t; \ *(volatile uint16_t *)((h) + (o)) = (v); \ } while (0) #define bus_space_write_4(t, h, o, v) \ do { \ (void) t; \ *(volatile uint32_t *)((h) + (o)) = (v); \ } while (0) #if 0 /* Cause a link error for bus_space_write_8 */ #define bus_space_write_8 !!! bus_space_write_8 not implemented !!! #endif /* * Operations which handle byte stream data on word access. * * These functions are defined to resolve endian mismatch, by either * - When normal (i.e. stream-less) operations perform byte swap * to resolve endian mismatch, these functions bypass the byte swap. * or * - When bus bridge performs automatic byte swap, these functions * perform byte swap once more, to cancel the bridge's behavior. * * Currently these are just same as normal operations, since all * supported buses are same endian with CPU (i.e. little-endian). * */ #define bus_space_read_stream_2(tag, bsh, offset) \ bus_space_read_2(tag, bsh, offset) #define bus_space_read_stream_4(tag, bsh, offset) \ bus_space_read_4(tag, bsh, offset) #define bus_space_read_stream_8(tag, bsh, offset) \ bus_space_read_8(tag, bsh, offset) #define bus_space_read_multi_stream_2(tag, bsh, offset, datap, count) \ bus_space_read_multi_2(tag, bsh, offset, datap, count) #define bus_space_read_multi_stream_4(tag, bsh, offset, datap, count) \ bus_space_read_multi_4(tag, bsh, offset, datap, count) #define bus_space_read_multi_stream_8(tag, bsh, offset, datap, count) \ bus_space_read_multi_8(tag, bsh, offset, datap, count) #define bus_space_read_region_stream_2(tag, bsh, offset, datap, count) \ bus_space_read_region_2(tag, bsh, offset, datap, count) #define bus_space_read_region_stream_4(tag, bsh, offset, datap, count) \ bus_space_read_region_4(tag, bsh, offset, datap, count) #define bus_space_read_region_stream_8(tag, bsh, offset, datap, count) \ bus_space_read_region_8(tag, bsh, offset, datap, count) #define bus_space_write_stream_2(tag, bsh, offset, data) \ bus_space_write_2(tag, bsh, offset, data) #define bus_space_write_stream_4(tag, bsh, offset, data) \ bus_space_write_4(tag, bsh, offset, data) #define bus_space_write_stream_8(tag, bsh, offset, data) \ bus_space_write_8(tag, bsh, offset, data) #define bus_space_write_multi_stream_2(tag, bsh, offset, datap, count) \ bus_space_write_multi_2(tag, bsh, offset, datap, count) #define bus_space_write_multi_stream_4(tag, bsh, offset, datap, count) \ bus_space_write_multi_4(tag, bsh, offset, datap, count) #define bus_space_write_multi_stream_8(tag, bsh, offset, datap, count) \ bus_space_write_multi_8(tag, bsh, offset, datap, count) #define bus_space_write_region_stream_2(tag, bsh, offset, datap, count) \ bus_space_write_region_2(tag, bsh, offset, datap, count) #define bus_space_write_region_stream_4(tag, bsh, offset, datap, count) \ bus_space_write_region_4(tag, bsh, offset, datap, count) #define bus_space_write_region_stream_8(tag, bsh, offset, datap, count) \ bus_space_write_region_8(tag, bsh, offset, datap, count) #define bus_space_write_region_stream_2(tag, bsh, offset, datap, count) \ bus_space_write_region_2(tag, bsh, offset, datap, count) #define bus_space_write_region_stream_4(tag, bsh, offset, datap, count) \ bus_space_write_region_4(tag, bsh, offset, datap, count) #define bus_space_write_region_stream_8(tag, bsh, offset, datap, count) \ bus_space_write_region_8(tag, bsh, offset, datap, count) #define bus_space_set_multi_stream_2(tag, bsh, offset, data, count) \ bus_space_set_multi_2(tag, bsh, offset, data, count) #define bus_space_set_multi_stream_4(tag, bsh, offset, data, count) \ bus_space_set_multi_4(tag, bsh, offset, data, count) #define bus_space_set_multi_stream_8(tag, bsh, offset, data, count) \ bus_space_set_multi_8(tag, bsh, offset, data, count) #define bus_space_set_region_stream_2(tag, bsh, offset, data, count) \ bus_space_set_region_2(tag, bsh, offset, data, count) #define bus_space_set_region_stream_4(tag, bsh, offset, data, count) \ bus_space_set_region_4(tag, bsh, offset, data, count) #define bus_space_set_region_stream_8(tag, bsh, offset, data, count) \ bus_space_set_region_8(tag, bsh, offset, data, count) /* * Bus read/write barrier methods. * * void bus_space_barrier(bus_space_tag_t tag, * bus_space_handle_t bsh, bus_size_t offset, * bus_size_t len, int flags); * * On the MIPS, we just flush the write buffer. */ #define bus_space_barrier(t, h, o, l, f) \ ((void)((void)(t), (void)(h), (void)(o), (void)(l), (void)(f), \ wbflush())) #include #endif /* _COBALT_BUS_FUNCS_H_ */